Mcwell Multimedia Mini Home Theater Cinema LCD LED Video Projector HDMI Resolution: 1920x1080; Contrast: 500:1; Brightness: 150 Lumens; Aspect Ratio: 16:9 and 4:3 Keystone Correction: 15 degrees; Image Size: 30-100 inch; Projection Distance: 1.07-3.5M Can be charged with power bank by Micro USB input Smart and affordable: Easy to carry it anywhere with 170mmx136mmx70mm Note: Not recommended for PPT or business presentation, ideal for home theater movies and video game use